At 11 p.m., the eye of Hurricane Florence was located 465 miles south-southeast of Bermuda.

Florence is moving toward the west-northwest near 13 mph. A west-northwest motion with an increase in forward speed is expected during the next couple of days.

A turn toward the northwest is forecast to occur late Wednesday night.

On the forecast track, the center of Florence will move over the southwestern Atlantic Ocean between Bermuda and the Bahamas Tuesday and Wednesday, and approach the coast of South Carolina or North Carolina on Thursday.

Satellite data indicate that maximum sustained winds have increased to near 140 mph, with higher gusts. Some additional strengthening is forecast during the next 36 hours.

Florence is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale.

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Isaac has been downgraded to a tropical storm as it heads due west toward the Caribbean Sea.

• Location: 960 miles east of the Lesser Antilles

• Maximum sustained winds: 70 mph

• Movement: west at 16 mph

At 11 p.m., the center of Tropical Storm Isaac was located 960 miles east of the Lesser Antilles.

Isaac is moving toward the west near 16 mph. A westward motion is expected to continue through the end of the week.

On the forecast track, Isaac is forecast to move across the Lesser Antilles and into the eastern Caribbean Sea on Thursday.

Maximum sustained winds decreased to 70 mph, with higher gusts. Isaac is expected to regain hurricane status Tuesday before the system approaches the Lesser Antilles.

Isaac is a small storm. Tropical-storm-force winds extend outward up to 45 miles.

Hurricane Helene

Hurricane Helene is strengthening rapidly as it moves away from the Cabo Verde Islands.

• Location: 535 miles west of the Cabo Verde Islands

• Maximum sustained winds: 110 mph

• Movement: west-northwest at 12 mph

At 11 p.m., the eye of Hurricane Helene was located 535 miles west of the Cabo Verde Islands.

Helene is moving toward the west-northwest near 12 mph. A west-northwest motion with a decrease in forward speed is expected through late Tuesday, followed by a turn toward the northwest and then toward the north-northwest on Wednesday and Thursday.

Maximum sustained winds increased to 110 mph, with higher gusts. Some additional strengthening is expected, and Helene is forecast to become a major hurricane.

Steady weakening is forecast to begin by late Tuesday.

Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 115 miles.